Remediate the 2026-09-03 feature-test findings

tests/test_plugins/test_guides.py

@@ -576,3 +576,24 @@ def test_a_section_counts_as_something_to_tick():
     ]
     # heading + step + two checklist items
     assert checklistitemcount(blocks) == 4
+
+
+def test_restoring_the_current_version_says_nothing_changed(gd_app, gd_clean):
+    """save() dedups on the content hash, so restoring the version that is
+    already current writes nothing. Reporting "Restored version N as a new
+    draft version" described a revision that did not exist, and the unchanged
+    revision list quietly disagreed with the message."""
+    from plugins.guides.models import GuideRevision
+    from plugins.guides.services import authoring
+    with gd_app.app_context():
+        guide = _newguide()
+        _, first = authoring.save(guide, title='T',
+                                  blocks=[_block('b1', 'paragraph', text='only')])
+        _db.session.commit()
+        before = guide.revision
+
+        authoring.restore(guide, first)
+        _db.session.commit()
+
+        assert guide.revision == before, 'nothing new was written'
+        assert GuideRevision.query.filter_by(guideid=guide.guideid).count() == 1